What grade bolt has a triangle?

What grade bolt has a triangle?

I have a bolt that is now damaged and needs replacement. The bolt has the normal 6 lines indicating it is a SAE Grade 8 bolt, but also has a small triangle between two of the lines.

What do the markings on bolts mean?

The higher the grade, the stronger the bolt. English bolts have radial lines on their head to identify the grade, or strength class. The number of lines on the bolt head is 2 less than the actual grade. So, for example, a grade 5 bolt will only have 3 radial lines on its head.

What does 3 marks on a bolt head mean?

The markings can identify the standard to which the bolt was made. For instance, if a bolt head contains three radial lines, then it’s a Grade 5 bolt. If it contains five radial lines, then the bolt is Grade 8.

What does JDF stand for on a bolt?

This is a great 8 bolt. Again you see JDF on that bolt on the top. Those initials again are manufacturers marking to indicate that this is their bolt and then you see 1, 2, 3, 4, 5, 6 slashes indicating it’s a grade 8.

How do you read bolt numbers?

How to Read Screw Sizes

1. Read the first letter of the size. This the largest diameter: the measurement of the screw on the thread.
2. Read the second number.
3. Read the third number, generally the one following the “x.”

Why the triangle marking on the bolt?

I added the triangle marking because when you buy a hardware kit from us (that WE put together), or a new King Bolt, you will NOT be getting a JHbolt. About 99% of the bolts we use in he shop have the triangle (aside from hardware provided in kits from an OEM). But hey, if we sell you a JHbolt, it is definitely OEM….

How do I know what grade of bolt I have?

You can usually figure out the grade, or strength, of a bolt by looking at the markings on its head. English bolts (U.S.S. or S.A.E) are categorized by grade, from grade 2 to grade 8, where the grade represents inch strength.

What is the difference between Grade 5 and Grade 8 bolts?

The number of lines on the bolt head is 2 less than the actual grade. So, for example, a grade 5 bolt will only have 3 radial lines on its head. A grade 8 bolt will have 6 radial lines on its head. Metric bolts are a bit more straight forward, usually having their strength class number stamped right on the bolt head.

What do the numbers on a bolt head mean?

English bolts have radial lines on their head to identify the grade, or strength class. The number of lines on the bolt head is 2 less than the actual grade. So, for example, a grade 5 bolt will only have 3 radial lines on its head.